화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Clean Technology, Vol.24, No.3, 198-205, September, 2018
DOI10.7464/ksct.2018.24.3.198  Export Citation
촉매 제조방법에 따른 Co-CeO2 촉매의 N2O 분해 특성 연구
Effect of the Preparation Method on the Activity of CeO2-promoted Co3O4 Catalysts for N2O Decomposition
김혜정1, 2, 김민재3, 2, 이승재2, 유인수2, 이광복1, †, 전상구2, †
  • 1충남대학교 에너지과학기술대학원, 34134 대전광역시 유성구 대학로 99
  • 2한국에너지기술연구원, 34129 대전광역시 유성구 가정로 152
  • 3고려대학교 화공생명공학과, 02841 서울특별시 성북구 안암로 145
Hye Jeong Kim1, 2, Min-Jae Kim3, 2, Seung-Jae Lee2, In-Soo Ryu2, Kwang Bok Yi1, †, and Sang Goo Jeon2, †
  • 1Graduate School of Energy Science and Technology, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 34134, Republic of Korea
  • 2Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea
  • 3Department of Chemical and Biological Engineering, Korea University, Anam-ro 145, Seongbuk-gu, Seoul, 02841, Republic of Korea
E-mail:,
초록
본 연구는 Co-CeO2 촉매의 N2O 분해 반응에서 촉매의 제조 방법이 활성에 미치는 영향을 고찰하였다. Co-CeO2 촉매는 공침법(Co-precipitation)과 함침법(Incipient wetness impregnation)으로 제조하였다. 제조된 촉매의 성능을 평가하기 위하여 N2O 직접 촉매 분해(Direct catalytic N2O decomposition) 반응을 250 ~ 375 ℃에서 실시하였다. 그 결과 공침법으로 제조된 촉매(CoCe-CP)는 O2 및/또는 H2O의 존재 하에서도 N2O 분해 반응에서 향상된 성능을 보인 반면에 함침법으로 제조된 촉매(CoCe-IM)는 그렇지 못하였다. 이러한 촉매 활성의 차이를 조사하기 위하여 XRD, BET, TEM, H2-TPR, O2-TPD 그리고 XPS 와 같은 촉매 특성 분석들을 진행하였다. 촉매의 제조 방법에 따라서 입자의 크기 및 표면적이 변화하는 것을 확인하였고 합성 과정이 촉매의 물리적 특성에 영향을 미치는 것을 알 수 있었다. 공침법으로 제조된 촉매의 활성 증가는 Co3+ → Co2+의 향상된 환원 특성 및 산소 탈착 속도 향상에 기인한 것으로 여겨진다. 하지만, N2O 분해와 관련이 있는 촉매의 표면 전하 상태 및 결합에너지는 제조 방법에 따라서 변하지 않는 것을 확인하였다.
This study investigated the influence of catalyst preparation on the activity of Co-CeO2 catalyst for N2O decomposition. Co-CeO2 catalysts were synthesized by co-precipitation and incipient wetness impregnation. In order to estimate the performance of the as prepared catalysts, direct catalytic N2O decomposition test was carried out under 250 ~ 375 ℃. As a result, the catalyst prepared by co-precipitation (CoCe-CP) showed an enhanced performance on N2O decomposition reaction even in the presence of O2 and/or H2O, whereas the impregnation catalyst (CoCe-IM) did not. In order to investigate the difference in catalytic activity, characterization such as XRD, BET, TEM, H2-TPR, O2-TPD, and XPS was conducted. It is confirmed that the particle size and specific surface area were changed depending on the catalyst preparation method and the synthesis process influenced the physical properties of the catalysts. In addition, the improvement in the activity of the catalyst prepared by co-precipitation is due to the enhanced reduction from Co3+ to Co2+ and the improved oxygen desorption rate. However, it has been confirmed that the surface electron state and binding energy, which are related to N2O decomposition, do not change depending on the preparation method.
Keywords:N2O decomposition;Catalyst;Cobalt oxide;Cerium oxide;Impregnation
  1. Kapteijn F, Rodriguezmirasol J, Moulijn JA, Appl. Catal. B: Environ., 9(1-4), 25 (1996)
  2. Trogler WC, Coord. Chem. Rev., 187, 303 (1999)
  3. Konsolakis M, ACS Catal., 5, 6397 (2015)
  4. Shimizu A, Tanaka K, Fujimori M, Chemosphere Global Change Sci., 2, 425 (2000)
  5. Perez-Ramirez J, Kapteijn F, Schoffel K, Moulijn JA, Appl. Catal. B: Environ., 44(2), 117 (2003)
  6. Marnellos GE, Efthimiadis EA, Vasalos IA, Appl. Catal. B: Environ., 46(3), 523 (2003)
  7. Bueno-Lopez A, Such-Basanez I, de Lecea CSM, J. Catal., 244(1), 102 (2006)
  8. Suarez S, Yates M, Petre AL, Martin JA, Avila P, Blanco J, Appl. Catal. B: Environ., 64(3-4), 302 (2006)
  9. Russo N, Fino D, Saracco G, Specchia V, Catal. Today, 119(1-4), 228 (2007)
  10. Obalova L, Jiratova K, Kovanda F, Valaskova M, Balabanova J, Pacultova K, J. Mol. Catal. A-Chem., 248(1-2), 210 (2006)
  11. Yan L, Ren T, Wang XL, Ji D, Suo JS, Appl. Catal. B: Environ., 45(2), 85 (2003)
  12. Melian-Cabrera I, Mentruit C, Pieterse JAZ, van den Brink RW, Mul G, Kapteijn F, Moulijn JA, Catal. Commun., 6, 301-305 (2005).
  13. Kawi S, Liu SY, Shen SC, Catal. Today, 68(1-3), 237 (2001)
  14. Li Y, Armor JN, Appl. Catal. B: Environ., 1, L21 (1992)
  15. Kim DS, Kim YH, Yie JE, Park ED, Korean J. Chem. Eng., 27(1), 49 (2010)
  16. Zhou HB, Huang Z, Sun C, Qin F, Xiong DS, Shen W, Xu HL, Appl. Catal. B: Environ., 125, 492 (2012)
  17. Perez-Alonso FJ, Melian-Cabrera I, Granados ML, Kapteijn F, Fierro JLG, J. Catal., 239(2), 340 (2006)
  18. Terribile D, Trovarelli A, Llorca J, de Leitenburg C, Dolcetti G, Catal. Today, 43(1-2), 79 (1998)
  19. Trovarelli A, Comments Inorg. Chem., 20, 263 (1999)
  20. Kwak BH, Park J, Yoon H, Kim HH, Kim L, Chung JS, Korean J. Chem. Eng., 31, 29 (2013)
  21. Ohnishi C, Asano K, Iwamoto S, Chikama K, Inoue M, Catal. Today, 120(2), 145 (2007)
  22. Asano K, Ohnishi C, Iwamoto S, Shioya Y, Inoue M, Appl. Catal. B: Environ., 78(3-4), 242 (2008)
  23. Yoshino H, Ohnishi CH, Hosokawa S, Wada K, Inoue M, J. Mater. Sci., 46, 797 (2010)
  24. Wang H, Ye JL, Liu Y, Li YD, Qin YN, Catal. Today, 129(3-4), 305 (2007)
  25. Bomben K, Moulder J, Sobol PE, Stickle W, Physical Electronics, (1995).
  26. Shen Q, Li LD, Li JJ, Tian H, Hao ZP, J. Hazard. Mater., 163(2-3), 1332 (2009)
  27. Niu Yanqing, Shang Tong, Hui Shien, Zhang Xiaolu, Lei Yu, Lv Yuan, Wang Shui, Fuel, 185, 316 (2016)